Linear Regression on HP 12c

CFA Level II
#1

I find it quite useful to get r, b0, b1, and COVx,y, etc., using the HP 12c (I supppose something similar is available with TA), however, two things annoy me. 1) If you have data as X (independent variable) and Y(dependent variable), after you enter the data, you will find that “g x_bar” gives the mean for the Y values, not the x values. So, I tend to enter the data in reverse. Examlpe, if you have: X, Y 2, 400 4, 370 1, 233 I do it like this: 400 ENTER 2 SIGMA+ 370 ENTER 4 SIGMA+ etc Then to get x_bar, I use “g x_bar” followed by [x>

#2

I don’t remember having to calculate regression coefficients from raw data on the exam. If I were you, I’d focus on concepts.

#3

I was watching the 2008 shweser videos and their advice followed martikus’…

#4

I don’t think it is strictly needed for the exam, but I don’t like ANOVA tables and memorizing some of the formulas. Here, I don’t need to guess how to derive the slope or the intercept, or the correlation coefficient, or the covariance, etc. So, why not use soemthing automatic like that? Learn a few keystrokes and you are set for life!

#5

do u know any shortcut fot TA BAII plus

#6

not me.

#7

It’s very easy if you use BA II to answer the above question: 1) “2nd” 2) “DATA” ( to enter x and y values) 3 )“2nd” 4) “CLR WORK” ( to clear prev work) 5) “2” (enter X1 = 2) 6) “enter” 7) “down arrow” (“INS” button to go to Y1) 8) “400” (enter Y1 = 400) 9) “down arrow” 10) “4” (enter X2 = 4) 11) “down arrow” 12) “370” (enter Y2 = 370) 13) “down arrow” 14) “1” (enter X3 = 1) 15) “down arrow” 16) “233” (enter Y3 = 233) 17) “2nd” 18) “STAT” (number 8 button) You’ll see “LIN”. Then , use “down arrow” , you’ll see n = 3 (number of observations), then keep using “down arrow” to find out the standard deviation and the correlation. Once you master the key strokes, you can get the answer in 30 seconds.